Overview of self-mixing interferometer applications to mechanical engineering

S Donati, M Norgia - Optical engineering, 2018 - spiedigitallibrary.org
We present an overview of the applications of self-mixing interferometer (SMI) to tasks of
interest for mechanical engineering, namely high-resolution measurement of linear …

Enhanced laser self-mixing interferometry based on tunable Fabry-Perot filter

H Hao, H Lin, J Chen, W Xia, D Guo, M Wang - Optics & Laser Technology, 2021 - Elsevier
In this paper, an enhanced laser self-mixing interferometry based on tunable Fabry-Perot
Filter is proposed. The frequency-modulated (FM) self-mixing signal is transformed into …

Sub-λ/2 displacement sensor with nanometric precision based on optical feedback interferometry used as a non-uniform event-based sampling system

OD Bernal, U Zabit, F Jayat, T Bosch - IEEE Sensors Journal, 2020 - ieeexplore.ieee.org
In this paper, a method based on the inherent event-based sampling capability of the laser
optical feedback interferometry (OFI) is proposed to recover sub-λ/2 displacement with a …

Exploiting the FM-signal in a laser-diode SMI by means of a Mach–Zehnder filter

M Norgia, D Melchionni, S Donati - IEEE Photonics Technology …, 2017 - ieeexplore.ieee.org
We develop a new method to read the frequency modulation (FM) of a laser diode self-
mixing interferometer (SMI), based on using a Mach-Zehnder interferometer as an edge …

Self-mixing interferometer with a laser diode: unveiling the FM channel and its advantages respect to the AM channel

S Donati, M Norgia - IEEE Journal of Quantum Electronics, 2017 - ieeexplore.ieee.org
In a self-mixing interferometer based on a diode laser, the measurement of the external
reflector displacement s (t) is carried out by looking at the optical-phase signal cos 2ks (t), a …

A Multi-Longitudinal Mode Quadrature Laser Self-Mixing Vibration Sensor for Fault Diagnosis of Bearing

Z Huang, Z Nie, H Xu, S Zhao, G Chen… - IEEE Sensors …, 2024 - ieeexplore.ieee.org
We theoretically propose and experimentally demonstrate a simple and compact approach
for the first generation of multilongitudinal mode quadrature laser self-mixing (MQLSM) …

Detection of single microparticles in airflows by edge-filter enhanced self-mixing interferometry

V Contreras, J Lönnqvist, J Toivonen - Optics express, 2016 - opg.optica.org
A laser Doppler velocimetry (LDV) sensor using the edge-filter enhanced self-mixing
interferometry (ESMI) is presented based on speed measurements of single microparticles …

High-sensitivity vibrometer based on FM self-mixing interferometry

M Norgia, F Bandi, A Pesatori… - Journal of Physics …, 2019 - iopscience.iop.org
We present a new optical instrument for vibrations measurement, based on a method to read
the frequency modulation of a laser diode self-mixing interferometer. The laser source, when …

Noise Decrease in a Balanced Self-Mixing Interferometer: Theory and Experiments

P Esmaili, M Norgia, S Donati - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In a self-mixing interferometer built around a laser diode, the signals at the outputs of the two
mirrors are in phase opposition, whereas noise fluctuations are partially correlated. Thus, on …

Native signal self-mix interferometer has less than 1 nm noise equivalent displacement

S Donati, M Norgia - Optics Letters, 2021 - opg.optica.org
We demonstrate that the native configuration of a self-mixing interferometer attains a
minimum detectable displacement of 0.72 nm or λ/1870 at the laser wavelength of 1310 nm …